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Britain's prime minister parodied the holiday film's note cards scene for an election ad -- but Grant found something missing.
Plus, the Tom Cruise joke that got cut from the Beatles-inspired film and Sarah Silverman's key contribution to the script.
Decades after the classic's debut, it's appeared in movies and TV shows as varied as "The Wonder Years," "You've Got Mail," "Hereditary" and "Toy Story 4."
Canadian prime minister's speech lights up Twitter.